In this post I will
very roughly estimate the speed of one object that passed in front of the hill by using the hill as a measuring device. I will only base my measurement on a small segment of the object's flight path which I feel is perpendicular to the camera (and may not be), and closest to the hill (our measuring device). Since we do not know the exact distance of the object, and all we know is that it is no further than 12500 feet away (the distance to the hill), I will make a chart displaying the speeds the object traveled at various distances. To start, I will calculate the speed of the object as if it were 12500 feet away.
The first thing I did was roughly align the video with the location on Google Earth. I then used Google Earth to measure the distance between point A and point B (where the UFO traveled in front of the hill).

My results show that if the object was 12500 feet away from the camera then the object traveled 755 feet between point A and point B.
Now to measure the amount of time it took for the object to travel from point A to point B I have to refer to the video details. The video I used for analysis plays at 30 frames per second. That is 1/30th of a second, which is 33.33 milliseconds per frame.
Now study the video and you will see that the object arrives at point A and sits for 3 frames and then moves to point B. So it took the object 3 frames to move from point A to B. That is 33.33 x 3 = 99.99 milliseconds. For simplification lets just round it to 100 milliseconds. It took 100ms for the object to move from A to B.
So now we can finish our speed calculations because we have a distance and a time....
If we assume the object is 12500 feet away, then the object traveled
755 feet per 100 milliseconds which is 5147 Miles Per Hour. That is pretty fast...
However, we don't know if the object is 12500 feet away, or 10 feet away, yet. So how fast would the object be traveling if it were only 10 feet away from the camera? Here is a chart I made:

Basically you divide our initial distance traveled (755 feet) by our initial distance away (12500 feet) and you will get 0.0604 feet. That means;
If the UFO was only 1 foot away from the camera, it only traveled 0.0604 feet in 100 milliseconds which is
0.41 Miles Per Hour.
If the UFO was only 5 feet away from the camera, it only traveled 0.302 feet in 100 milliseconds which is
2 Miles Per Hour.
If the UFO was only 10 feet away from the camera, it only traveled 0.604 feet in 100 milliseconds which is
4 Miles Per Hour.
If the UFO was 6250 feet away from the camera, it traveled 377.5 feet in 100 milliseconds which is
2574 Miles Per Hour. (see the chart above)
So, now we know the approximate speed of the object at various distances. From the looks of it, the only speeds that make sense (if you are not thinking about sci-fi spaceships) are the ones that are in close proximity to the camera. It makes sense when you think about the average speed of most flying insects...
For example; The average flight speed of a common house fly is 4.5 MPH. According to the speed estimation, if the UFO was 10 feet away from the camera then it was flying 4 MPH. That means the UFO could possibly be a common house fly that is only 10 feet away from the camera.
Another example; The average flight speed of a honey bee is 12 to 15 MPH. According to the speed estimation, if the UFO was 35 feet away from the camera then it was flying 14.4 MPH which is about the right speed for a honey bee.
To Be Continued...